I have read all the threads on 2011 Outlook Smart Folders .
I have also read the Microsoft tutorial.   I still do not understand how to use them

Is there a comprehensive article somewhere regarding building and using smart folders?

For example, I want to use smart folders for all emails from multiple sources for one client.

When I enter multiple email addresses in multiple panels of the smart folder they appear to
cancel each other out.  If I understood how to have multiple email addresses go into a Smart 
Folder that would be most helpful.